Sachi Umino

The sub heroine of this work. She is Nagi's sister-in-law (adopted) and Erika's biological sister. Her blood type is B and she is 156 cm tall. She is as beautiful as Erica and has a little brother complex. As soon as her cohabitation begins, she lives in a mansion. Her favorite ice cream is Sui Cover and the food she cooks looks terrible, but the taste is surprisingly fine.